Process and device for metering pulverulent materials

Details Process and device for metering pulverulent materials Process and device for metering pulverulent materials

1986-01-03

1988-12-06

Beck, Shrive P.

Coating processes

Spraying

222636, 118308, 406 52, 406 53, 406 63, B05D 112

Patent

active

047895691

ABSTRACT:
The invention is in a pneumatic powder ejector comprising a suction stage and an injection stage. The suction stage includes a suction chamber (16), a venturi (14) communicating a primary gas to the suction chamber and a lateral suction input (18) offset in relation to the downstream and of the venturi. The injection stage includes a nozzle (22), an injection chamber (36) and a diffuser (38). The stages are located within and coaxially of the body of a tubular ejector. The nozzle includes a path for powder and primary gas between the suction chamber and diffuser, and is formed to provide a flow path of reduced dimension to communicate a secondary or entrainment gas between the diffuser and injection station.

REFERENCES:
patent: 2924488 (1960-02-01), Lawver
patent: 3109680 (1963-11-01), Brooks
patent: 3149759 (1964-09-01), Manley
patent: 3201001 (1965-08-01), Roberts et al.
patent: 3312151 (1967-04-01), Molins
patent: 3648901 (1972-03-01), Cade
patent: 3669502 (1972-06-01), Leman
patent: 4227835 (1980-10-01), Nussbaum

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